[의학] 외상성 뇌손상 - tbi[Traumatic Brain Injury]

1.Definition

Traumatic Brain Injury(외상성 뇌손상)

외상으로 인해 뇌에 손상을 입은
일반적인 상태
2.Causes
3.Mechanisms
1)Penetrating injuries

2)Blunt injuries- acceleration, deceleration, rotational
3.Mechanisms
3)Tissue compression, tension or forces
4)Coup : injury at side of imfact
5)Contrecoup : injury away from site of imfact

4.Classification

1)Open or closed
2)High or low velocity impact
3)Focal or diffuse
- Coup-Contrecoup injury
4)Diffuse axonal injury
-피질하 축삭의 수초화가 어느 한 영역에
집중적이지 않고 광범위하게 손상된 경우


   
1)Contusions
2)lacerations
3)shearing or tearing injuries
4)hemorrhage

Intracerebral hemorrhage
5.primary injury
1)저산소혈증손상(hypoxic-ischemic injury)
동맥저산소혈증(동맥저혈압)
혈류용적 단위당 산소용적 감소
뇌혈관 확장
혈류흐름 증가
자동조절기전 손상
-`산소공급 차단
뇌조직 허혈
6.Secondary injury
2)두개골내부 혈종(intracranial hematomas)
-뒤늦게 나타남, 혈종…